/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/ObjectElements/DatasmithUObjectElements.h
Set the UV channel that will be used for the lightmap Note: If the lightmap coordinate index is something greater than -1 it will make the importer skip the lightmap generation
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Datasmith | Element") void SetLightmapCoordinateIndex ( int32 UVChannel )